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SubjectRe: [PATCH V16 14/14] irqchip / ACPI: Introduce ACPI_IRQ_MODEL_LPIC for LoongArch
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On 2022/7/19 上午10:25, Huacai Chen wrote:
> Hi, Jianmin,
>
> On Mon, Jul 18, 2022 at 10:21 PM Jianmin Lv <lvjianmin@loongson.cn> wrote:
>>
>> For LoongArch, ACPI_IRQ_MODEL_LPIC is introduced, and then the
>> callback acpi_get_gsi_domain_id and acpi_gsi_to_irq_fallback are
>> implemented.
>>
>> The acpi_get_gsi_domain_id callback returns related fwnode handle
>> of irqdomain for different GSI range.
>>
>> The acpi_gsi_to_irq_fallback will create new mapping for gsi when
>> the mapping of it is not found.
>>
>> Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
>> ---
>> drivers/acpi/bus.c | 3 +++
>> drivers/irqchip/irq-loongarch-cpu.c | 38 +++++++++++++++++++++++++++++++++++++
>> include/linux/acpi.h | 1 +
>> 3 files changed, 42 insertions(+)
>>
>> diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
>> index 86fa61a..63fbf00 100644
>> --- a/drivers/acpi/bus.c
>> +++ b/drivers/acpi/bus.c
>> @@ -1145,6 +1145,9 @@ static int __init acpi_bus_init_irq(void)
>> case ACPI_IRQ_MODEL_PLATFORM:
>> message = "platform specific model";
>> break;
>> + case ACPI_IRQ_MODEL_LPIC:
>> + message = "LPIC";
>> + break;
>> default:
>> pr_info("Unknown interrupt routing model\n");
>> return -ENODEV;
>> diff --git a/drivers/irqchip/irq-loongarch-cpu.c b/drivers/irqchip/irq-loongarch-cpu.c
>> index b4db430..a5e0bf0 100644
>> --- a/drivers/irqchip/irq-loongarch-cpu.c
>> +++ b/drivers/irqchip/irq-loongarch-cpu.c
>> @@ -16,6 +16,42 @@
>> static struct irq_domain *irq_domain;
>> struct fwnode_handle *cpuintc_handle;
>>
>> +static u32 lpic_gsi_to_irq(u32 gsi)
>> +{
>> + /* Only pch irqdomain transferring is required for LoongArch. */
>> + if (gsi >= GSI_MIN_PCH_IRQ && gsi <= GSI_MAX_PCH_IRQ)
>> + return acpi_register_gsi(NULL, gsi, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_HIGH);
>> +
>> + return 0;
>> +}
>> +
>> +static struct fwnode_handle *lpic_get_gsi_domain_id(u32 gsi)
>> +{
>> + int id;
>> + struct fwnode_handle *domain_handle = NULL;
>> +
>> + switch (gsi) {
>> + case GSI_MIN_CPU_IRQ ... GSI_MAX_CPU_IRQ:
>> + if (liointc_handle)
>> + domain_handle = liointc_handle;
>> + break;
>> +
>> + case GSI_MIN_LPC_IRQ ... GSI_MAX_LPC_IRQ:
>> + if (pch_lpc_handle)
>> + domain_handle = pch_lpc_handle;
>> + break;
>> +
>> + case GSI_MIN_PCH_IRQ ... GSI_MAX_PCH_IRQ:
>> + id = find_pch_pic(gsi);
>> + if (id >= 0 && pch_pic_handle[id])
>> + domain_handle = pch_pic_handle[id];
>> +
> Remove this blank line, please.
>

Ok, thanks.


> Huacai
>> + break;
>> + }
>> +
>> + return domain_handle;
>> +}
>> +
>> static void mask_loongarch_irq(struct irq_data *d)
>> {
>> clear_csr_ecfg(ECFGF(d->hwirq));
>> @@ -102,6 +138,8 @@ static int __init cpuintc_acpi_init_v1(union acpi_subtable_headers *header,
>> panic("Failed to add irqdomain for LoongArch CPU");
>>
>> set_handle_irq(&handle_cpu_irq);
>> + acpi_set_irq_model(ACPI_IRQ_MODEL_LPIC, lpic_get_gsi_domain_id);
>> + acpi_set_gsi_to_irq_fallback(lpic_gsi_to_irq);
>> acpi_cascade_irqdomain_init();
>>
>> return 0;
>> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
>> index e2b60d5..76520f3 100644
>> --- a/include/linux/acpi.h
>> +++ b/include/linux/acpi.h
>> @@ -105,6 +105,7 @@ enum acpi_irq_model_id {
>> ACPI_IRQ_MODEL_IOSAPIC,
>> ACPI_IRQ_MODEL_PLATFORM,
>> ACPI_IRQ_MODEL_GIC,
>> + ACPI_IRQ_MODEL_LPIC,
>> ACPI_IRQ_MODEL_COUNT
>> };
>>
>> --
>> 1.8.3.1
>>
>>

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